Acharya Lopamudra, Biswal Lijarani, Mishra Bhagyashree Priyadarshini, Das Sarmistha, Dash Srabani, Parida Kulamani
Centre for Nano Science and Nano Technology, ITER, Siksha 'O' Anusandhan Deemed to be University, Bhubaneswar, Odisha, 751030, India.
Chemistry. 2024 Aug 19;30(46):e202400496. doi: 10.1002/chem.202400496. Epub 2024 Jul 29.
The prodigious employment of fossil fuels to conquer the global energy demand is becoming a dreadful threat to the human society. This predicament is appealing for a potent photocatalyst that can generate alternate energy sources via solar to chemical energy conversion. With this interest, we have fabricated a ternary heterostructure of TiC nanosheet modified g-CN/BiO (MCNRBO) Z-scheme photocatalyst through self-assembly process. The morphological analysis clearly evidenced the close interfacial interaction between g-CN nanorod, BiO and TiC nanosheets. The oxygen vacancy created on BiO surface, as suggested by XPS and EPR analysis, supported the Z-scheme heterojunction formation between g-CN nanorod and BiO nanosheets. The collaborative effect of Z-scheme and Schottky junction significantly reduced charge transfer resistance promoting separation efficiency of excitons as indicated from PL and EIS analysis. The potential of MCNRBO towards photocatalytic application was investigated by HO and H evolution reaction. A superior photocatalytic HO and H production rate for MCNRBO is observed, which are respectively around 5 and 18 folds higher as compared to pristine CNR nanorod. The present work encourages for the development of a noble, eco-benign and immensely efficient dual heterojunction based photocatalyst, which can acts as saviour of human society from energy crisis.
大量使用化石燃料来满足全球能源需求正成为人类社会面临的可怕威胁。这种困境促使人们寻求一种高效的光催化剂，能够通过太阳能到化学能的转换来产生替代能源。基于此兴趣，我们通过自组装过程制备了一种TiC纳米片修饰的g-CN/BiO（MCNRBO）Z型光催化剂的三元异质结构。形态分析清楚地证明了g-CN纳米棒、BiO和TiC纳米片之间紧密的界面相互作用。XPS和EPR分析表明，BiO表面产生的氧空位支持了g-CN纳米棒和BiO纳米片之间Z型异质结的形成。如PL和EIS分析所示，Z型和肖特基结的协同效应显著降低了电荷转移电阻，提高了激子的分离效率。通过HO和H析出反应研究了MCNRBO在光催化应用方面的潜力。观察到MCNRBO具有优异的光催化HO和H生成速率，分别比原始的CNR纳米棒高约5倍和18倍。目前的工作鼓励开发一种高尚、生态友好且效率极高的基于双异质结的光催化剂，它可以成为人类社会摆脱能源危机的救星。
